Correct Answer: B

Rationale: The correct action for the nurse to take when a client reports orange urine after taking rifampin is to inform the client that this change is not harmful. Rifampin is known to cause orange discoloration of urine, which is a harmless side effect. There is no need to notify the health care provider as this is an expected outcome. Monitoring creatinine levels or assessing for nephrotoxicity is unnecessary in this situation, as rifampin does not typically cause kidney damage.

Correct Answer: B

Rationale: The highest priority for the PN is to assess the rate and depth of the client's respirations when a client is receiving morphine via a PCA pump. Respiratory depression is a life-threatening side effect of intravenous morphine administration. If the client's respiratory rate falls below 10 breaths/min, the PCA pump should be stopped, and the healthcare provider must be notified immediately to prevent further complications.

Correct Answer: C

Rationale: In clients who are unable to communicate, observing for pain behaviors is crucial in assessing analgesic tolerance. Changes in pain behaviors can indicate if the current analgesic regimen is effective or if tolerance has developed. Therefore, closely observing the client for pain behaviors before the next analgesic dose helps healthcare providers evaluate the client's response to pain management.

Correct Answer: D

Rationale: The client's low heart rate of 48 beats/min indicates bradycardia, a potential side effect of labetalol. Administering the dose in this case could further lower the heart rate, potentially causing adverse effects. Therefore, it is crucial to withhold the scheduled dose and notify the healthcare provider for further assessment and guidance.

Correct Answer: A

Rationale: Furosemide is a loop diuretic that inhibits the reabsorption of sodium and chloride in the kidneys, leading to increased potassium excretion and potentially causing hypokalemia. Hypokalemia can lead to cardiac irregularities, making it crucial for the practical nurse to monitor the client for this electrolyte imbalance.